20320507 has 2 divisors, whose sum is σ = 20320508. Its totient is φ = 20320506.

The previous prime is 20320483. The next prime is 20320537. The reversal of 20320507 is 70502302.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20320507 - 2¹⁵ = 20287739 is a prime.

It is not a weakly prime, because it can be changed into another prime (20320537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160253 + 10160254.

It is an arithmetic number, because the mean of its divisors is an integer number (10160254).

Almost surely, 2^20320507 is an apocalyptic number.

20320507 is a deficient number, since it is larger than the sum of its proper divisors (1).

20320507 is an equidigital number, since it uses as much as digits as its factorization.

20320507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420, while the sum is 19.

The square root of 20320507 is about 4507.8273037019. The cubic root of 20320507 is about 272.8840674722.

Adding to 20320507 its reverse (70502302), we get a palindrome (90822809).

The spelling of 20320507 in words is "twenty million, three hundred twenty thousand, five hundred seven".